- an animal one year old or in its second year
- Horse Racing a horse one year old: all thoroughbreds' birthdays are arbitrarily set at January 1, at which time a foal born on any date of the preceding year is reckoned one year old
being a year old
See yearling in American Heritage Dictionary 4
- An animal that is one year old or has not completed its second year.
- A thoroughbred racehorse one year old dating from January 1 of the year in which it was foaled.
Being one year old.
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